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Calculate the pH after the addition of the following volumes of 0.2M NaOH to 30mL of 0.2MH2X(H2X is a diprotic acid with Ka1=2.110 , Ka2=4.4109).

Calculate the pH after the addition of the following volumes of 0.2M NaOH to 30mL of 0.2MH2X(H2X is a diprotic acid with Ka1=2.110 , Ka2=4.4109). a) 10.0mL of NaOH b) 30.0mL of NaOH c) 40.0mL of NaOH d) 60.0mL of NaOH

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